SMTP relay - Client host rejected: AP0002
Hello everyone, We have to send emails to a Bouyges address (a french telecom company) and I got this back: Sorry, no SMTP connection got far enough; most progress: RCPT TO response; remote host said: 554 5.7.1 <...dsl.sta.abo.bbox.fr>: Client host rejected: AP0002 Please use your ISP mailserver. (#5.5.0) I searched on Google to find a way to send the emails and what I understand is that I have to configure the SMTP relay of Bouyges. What I found are only configurations for postfix and I don't know how to configure it on an Exchange On-premise server, do you have any info? The SMTP server of Bouyges is smtp.bbox.fr What I don't know if it's possible to do is to use this relay only for the bbox mails address. Thanks for any help!
Exchange 2019 SMTP Receive Connector
Hi Tech, We have Exchange 2019, SMTP Open Relay Receive Connector. We have around 300+ services using this connector. Recently We engaged a few customers and performed exercise to send email with Authentication. My question here is, How we can find which smtp connection/IP is relaying emails using authentication and which connection/IP is relaying email anonymously/without authentication. I tried finding authentication tags in smtp receive connector's logging without any success. Any idea or direction to achieve this? Thank in Advance.